Chemostat type equations modelling a polluted environment

Research Article On the Study of Chemostat Model with Pulsed Input in a Polluted Environment

Global Stability in Chemostat-type Equations with Distributed Delays∗

We consider a chemostat-type model in which a single species feeds on a limiting nutrient supplied at a constant rate. The model incorporates a general nutrient uptake function and two distributed (infinite) delays. The first delay models the fact that the nutrient is partially recycled after the death of the biomass by bacterial decomposition, and the second delay indicates that the growth of ...

Competition in chemostat-type equations with two habitats.

Competition on a model with nutrient recycling is considered. The model is based on a chemostat-type equation which is used to study population dynamics of microorganisms. The model consists of four organisms competing for a limiting nutrient. Nutrient is supplied both from the in-flow of medium and a recycling with delay, the latter is generated from dead organisms by bacterial decomposition. ...

Spindle trees (Euonymus japonica Thunb.) growing in a polluted environment are less sensitive to gamma irradiation

Background: Spindle trees (Euonymus japonica Thunb.) growing in an industrial complex area containing pollutants is chronically injured thus need to build up their resistance. Antioxidant enzymes and cell membrane stability have been widely used to differentiate stress tolerance. Materials and Methods: Leaves of spindle trees from a clean control area (Kijang) and an industrial area (Onsan) whe...

Modelling and simulation of a polluted water pumping process

The objective of this article is to discuss the modeling and simulation of the motion of oil spots in the open sea, and the effect on the pollutant concentration when a polluted water pumping ship follows a pre–assigned trajectory to remove the pollutant. We assume here that the oil spots motion is due to the coupling of diffusion, the transport from the wind, sea currents and pumping process a...